Large Multilayer Radomes

Electrically large multilayer radomes represent important part of the realistic antenna structures. Thus, models of multilayer radomes are simulated by using full 3D electromagnetic software – the WIPL-D software which successfully exploits CPU multi-threading capabilities.

In this application note we demonstrated that number of unknowns can be significantly reduced for large multilayer radome simulations by using WIPL-D built-in techniques. The process of was done without impacting the accuracy of the results. Typical reduction in terms of number of unknowns is several times (for the smaller 3-layer radome the reduction is above 3 times).

We also present the efficient utilization of Domain Decomposition Solver (DDS), which can be used in solving electrically very large problems, for radome simulations. Starting from the 4th iteration, DDS result showed fine accuracy compared to the full-wave Method-of-moments (MoM) solution. The comparison was done for a smaller 3-layer radome which basically reaches the limits of MoM solution (for the reasonable simulation time). Based on this, we proceed to the simulation of much larger, numerically more demanding model of the 7 layer radome. DDS allows such a simulation for acceptable simulation time on moderate CPU-based platform.

The final simulation that was performed requires over 2 million unknowns. While it is still beyond the reach of full wave MoM, it can be very efficiently solved by DDS.

Section: Arrays & Radomes

For full version of the document, please check the following pdf.